[haiku-development] Re: Reproducing system pauses.

From: Fredrik Holmqvist <fredrik.holmqvist@xxxxxxxxx>

To: haiku-development@xxxxxxxxxxxxx

Date: Wed, 29 Jul 2009 17:12:03 +0200

2009/7/29 Bruno Albuquerque <bga@xxxxxxxxxxxxx>:
> Fredrik Holmqvist wrote:
>> A sidenote: I noticed while building and using ActivityMonitor. It
>> seems that the two cpu-graphs most of the time is the inverse of each
>> other (tested with -j2 and -j8) which may either be poor buildscripts
>> for Mozilla, or hinting at something else.
>> Bruno, you havn't noticed anything peculiar on your multicore machine,
>> like one with high cpu and three low?
>> It's probably nothing, but just thought I'd check.
>
> What I noticed is that our scheduler tends to underutilize the CPUs. In
> Linux If i do jam -j4, almost all the time the 4 cores are pegged to 100%
> usage. In Haiku the cores oscillate a lot from 0 to 100% usage (even with
> -j8, that still happens).It could just be that we are waiting a lot more in
> IO in Haiku than in Linux tough.
Yes, that is a thing I've noticed as well.
/Fredrik Holmqvist, TQH